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Windows 11 Bug Locks C: Drive Access
14 Mar
Summary
- A critical bug prevents access to the C: drive on Windows 11.
- The issue predominantly affects Samsung laptops and is under investigation.
- Microsoft is working on a fix for the problem impacting drive access.
A significant software defect is currently locking numerous Windows 11 users out of their primary C: drive. The problem, which manifests as an "Access denied" error, appears to be widespread, particularly impacting laptops manufactured by Samsung. Microsoft has confirmed it is investigating this critical issue alongside Samsung.
The bug, potentially introduced with the February 2026 security update (KB5077181), cripples hard drive access, affecting the functionality of essential applications like Office and web browsers. Microsoft has noted that this issue primarily concerns Windows 11 versions 24H2 and 25H2.
Affected users are experiencing difficulties accessing files, launching applications, and performing administrative tasks, rendering their systems practically unusable. Microsoft has provided guidance on rolling back the problematic update and advises users who have not yet installed it to pause its installation. Workarounds involving changing drive ownership have been suggested on community forums, but users are cautioned about potential risks.
